protected internal override void OnPointerMoved(PointerRoutedEventArgs e)
{
if (ChartArea == null)
{
return;
}
if (this.EnableSegmentSelection || this.EnableSeriesSelection)
{
FrameworkElement element = e.OriginalSource as FrameworkElement;
ChartSegment segment = null;
if (element != null)
{
if (element.Tag != null)
{
segment = element.Tag as ChartSegment;
}
}
if (segment is TrendlineSegment)
{
return;
}
if (element.DataContext is LegendItem)
{
return;
}
#if __IOS__ || __ANDROID__
var image = (element as Border)?.Child as Image;
#else
var image = element as Image;
#endif
if (segment != null && segment.Series is ISegmentSelectable && !(segment.Item is Trendline))
{
// Scatter series supports selection and dragging at the same time.
if (!(segment.Series is ScatterSeries) && IsDraggableSeries(segment.Series))
{
return;
}
if (!segment.Series.IsLinear || EnableSeriesSelection)
{
ChangeSelectionCursor(true);
}
else
{
ChangeSelectionCursor(false);
}
if (SelectionMode == Charts.SelectionMode.MouseMove)
{
if (!segment.Series.IsSideBySide && segment.Series is CartesianSeries &&
!(segment.Series is ScatterSeries) && !(segment.Series is BubbleSeries))
{
Point canvasPoint = e.GetCurrentPoint(segment.Series.ActualArea.GetAdorningCanvas()).Position;
ChartDataPointInfo data = (segment.Series as ChartSeries).GetDataPoint(canvasPoint);
OnMouseMoveSelection(segment.Series, data);
}
else
{
int segIndex = segment.Series is CircularSeriesBase && !double.IsNaN(((CircularSeriesBase)segment.Series).GroupTo) ?segment.Series.Segments.IndexOf(segment): segment.Series.ActualData.IndexOf(segment.Item);
OnMouseMoveSelection(segment.Series, segIndex);
}
}
}
else if (e.OriginalSource is Shape && (e.OriginalSource as Shape).DataContext is ChartAdornmentContainer &&
((e.OriginalSource as Shape).DataContext as ChartAdornmentContainer).Tag is int)
{
// Check the selected element is adornment shape
selectedAdornmentPresenter = VisualTreeHelper.GetParent((e.OriginalSource as Shape).DataContext
as ChartAdornmentContainer) as ChartAdornmentPresenter;
if (IsDraggableSeries(selectedAdornmentPresenter.Series))
{
return;
}
ChangeSelectionCursor(true);
if (SelectionMode == Charts.SelectionMode.MouseMove)
{
index = (int)((e.OriginalSource as Shape).DataContext as ChartAdornmentContainer).Tag;
if (selectedAdornmentPresenter != null && selectedAdornmentPresenter.Series is ISegmentSelectable)
{
OnMouseMoveSelection(selectedAdornmentPresenter.Series, index);
}
}
}
else if (image != null && image.Source is WriteableBitmap)
{
GetBitmapSeriesCollection(element, e);
// Bitmap segment selection process handling.
if (SelectionMode == Charts.SelectionMode.MouseMove)
{
OnBitmapSeriesMouseMoveSelection(element, e);
}
}
else if (element is Border || element is TextBlock || element is Shape) // check the selected element is adornment label
{
ChangeSelectionCursor(false);
FrameworkElement frameworkElement = e.OriginalSource as FrameworkElement;
int count = e.OriginalSource is TextBlock ? 3 : 2;
for (int i = 0; i < count; i++)
{
if (frameworkElement != null)
{
frameworkElement = VisualTreeHelper.GetParent(frameworkElement) as FrameworkElement;
}
else
{
break;
}
}
if (frameworkElement is ContentPresenter)
{
index = ChartExtensionUtils.GetAdornmentIndex(frameworkElement);
if (index != -1)
{
ChangeSelectionCursor(true);
}
if (SelectionMode == Charts.SelectionMode.MouseMove)
{
frameworkElement = VisualTreeHelper.GetParent(frameworkElement) as FrameworkElement;
if (frameworkElement is ChartAdornmentPresenter || frameworkElement is ChartAdornmentContainer)
{
while (!(frameworkElement is ChartAdornmentPresenter) && frameworkElement != null)
{
frameworkElement = VisualTreeHelper.GetParent(frameworkElement) as FrameworkElement;
}
selectedAdornmentPresenter = frameworkElement as ChartAdornmentPresenter;
if (IsDraggableSeries(selectedAdornmentPresenter.Series))
{
return;
}
if (selectedAdornmentPresenter != null && selectedAdornmentPresenter.Series is ISegmentSelectable)
{
OnMouseMoveSelection(selectedAdornmentPresenter.Series, index);
}
}
}
}
var contentControl = frameworkElement as ContentControl;
if (contentControl != null && contentControl.Tag is int)
{
ChangeSelectionCursor(true);
if (SelectionMode == Charts.SelectionMode.MouseMove)
{
index = (int)contentControl.Tag;
frameworkElement = VisualTreeHelper.GetParent(frameworkElement) as FrameworkElement;
var chartAdornmentPresenter = frameworkElement as ChartAdornmentPresenter;
if (chartAdornmentPresenter != null)
{
selectedAdornmentPresenter = chartAdornmentPresenter;
if (IsDraggableSeries(selectedAdornmentPresenter.Series))
{
return;
}
if (selectedAdornmentPresenter != null && selectedAdornmentPresenter.Series is ISegmentSelectable)
{
OnMouseMoveSelection(selectedAdornmentPresenter.Series, index);
}
}
}
}
}
else if (ChartArea.PreviousSelectedSeries != null && ChartArea.CurrentSelectedSeries != null && SelectionMode == Charts.SelectionMode.MouseMove &&
ChartArea.VisibleSeries.Contains(ChartArea.PreviousSelectedSeries))
{
ChangeSelectionCursor(false);
bool isCancel;
if (EnableSeriesSelection)
{
isCancel = ChartArea.CurrentSelectedSeries.RaiseSelectionChanging(-1, ChartArea.SeriesSelectedIndex);
}
else
{
isCancel = ChartArea.CurrentSelectedSeries.RaiseSelectionChanging(
-1,
(ChartArea.CurrentSelectedSeries as ISegmentSelectable).SelectedIndex);
}
if (!isCancel)
{
Deselect();
}
}
else
{
ChangeSelectionCursor(false);
}
}
else
{
ChangeSelectionCursor(false);
}
}
/// <summary>
/// Called when Pointer Released in Chart
/// </summary>
/// <param name="e"></param>
protected internal override void OnPointerReleased(PointerRoutedEventArgs e)
{
if (ChartArea == null)
{
return;
}
if (SelectionMode == Charts.SelectionMode.MouseClick)
{
FrameworkElement element = e.OriginalSource as FrameworkElement;
ChartSegment segment = null;
ChartArea.CurrentSelectedSeries = null;
if (element != null)
{
if (element.Tag != null)
{
segment = element.Tag as ChartSegment;
}
}
if (segment is TrendlineSegment)
{
return;
}
#if __IOS__ || __ANDROID__
var image = (element as Border)?.Child as Image;
#else
var image = element as Image;
#endif
if (image != null && image.Source is WriteableBitmap)
{
// Bitmap segment selection process handling.
OnBitmapSeriesMouseDownSelection(element, e);
}
else if (segment != null && segment == mouseUnderSegment && segment.Series is ISegmentSelectable &&
!(segment.Item is Trendline))
{
if (!segment.Series.IsSideBySide && segment.Series is CartesianSeries &&
!(segment.Series is ScatterSeries) && !(segment.Series is BubbleSeries))
{
Point canvasPoint = e.GetCurrentPoint(segment.Series.ActualArea.GetAdorningCanvas()).Position;
ChartDataPointInfo data = (segment.Series as ChartSeries).GetDataPoint(canvasPoint);
OnMouseDownSelection(segment.Series, data);
}
else
{
int index = -1;
if ((segment.Series.ActualXAxis is CategoryAxis) && !(segment.Series.ActualXAxis as CategoryAxis).IsIndexed &&
segment.Series.IsSideBySide && !(segment.Series is FinancialSeriesBase) && (!(segment.Series is RangeSeriesBase)) &&
!(segment.Series is WaterfallSeries))
{
index = segment.Series.GroupedActualData.IndexOf(segment.Item);
}
else
{
index = segment.Series is CircularSeriesBase && !double.IsNaN(((CircularSeriesBase)segment.Series).GroupTo)? segment.Series.Segments.IndexOf(segment): segment.Series.ActualData.IndexOf(segment.Item);
}
OnMouseDownSelection(segment.Series, index);
}
}
else
{
// Get the selected adornment index and select the adornment marker
index = ChartExtensionUtils.GetAdornmentIndex(element);
FrameworkElement frameworkElement = e.OriginalSource as FrameworkElement;
var chartAdornmentPresenter = frameworkElement as ChartAdornmentPresenter;
while (frameworkElement != null && chartAdornmentPresenter == null)
{
frameworkElement = VisualTreeHelper.GetParent(frameworkElement) as FrameworkElement;
chartAdornmentPresenter = frameworkElement as ChartAdornmentPresenter;
}
if (chartAdornmentPresenter != null &&
chartAdornmentPresenter.Series is ISegmentSelectable)
{
OnMouseDownSelection(chartAdornmentPresenter.Series, index);
}
}
if (selectedAdornmentPresenter != null)
{
selectedAdornmentPresenter = null;
}
}
AdorningCanvas.ReleasePointerCapture(e.Pointer);
}
